HP Omnibook 500 Service Manual

HP Omnibook 500 Removal and Replacement 2-25
Removing the Motherboard or Bottom Case
(HP Authorized Service Providers Only)
Required Equipment
 
• #0 Phillips screwdriver.
Removal Procedure
  Note: Before Replacing the Motherboard
 
If possible, record the computer’s electronic serial number before you replace the motherboard.
You will then store the electronic serial number in the EEPROM on the new motherboard using
the Service Utility floppy disk.
1.  Download the Omnibook 500 service package from the...

2-26 Removal and Replacement HP Omnibook 500
 4.
 Disconnect the speaker wires from the motherboard. If the connector does not release easily, try
gently pressing down on the rear of the connector (near the wires) as you pull it out.
 5.
 Remove the right-rear screw (nearest the speaker) from the hard drive/LED flex cable, then
disconnect the cable from the motherboard.
 6.
 Remove both standoff screws from the back of the unit.
 7.
 Remove the four screws from the motherboard (each marked by a white...

HP Omnibook 500 Removal and Replacement 2-27
Replacing the Motherboard
Required Equipment
 
• #0 Phillips screwdriver.
Removal Procedure
 1.
 
Mini-PCI models only: release the latches at the sides of the card, so that its free edge pops up,
and carefully pull the card out of its connector.
 2.
 
Mini-PCI models only: disconnect the cables that connect the mini-PCI panel to the
motherboard, and remove the panel and the mini-PCI card (still connected) from the motherboard.
 3.
 Disconnect and remove the...

2-28 Removal and Replacement HP Omnibook 500
Reassembly Note
 
• Reinstall the motherboard in the unit following the “Reassembly Notes” on page 2-26.
  Note: After Replacing the Motherboard
 
After replacing the motherboard, you must use the Service Utility floppy disk to store the system
data and display information in the EEPROM on the new motherboard.
1.  Connect a floppy disk drive to the computer using a USB floppy cable, or dock the computer
and insert a floppy drive module into the expansion...

HP Omnibook 500 Removal and Replacement 2-29
Replacing the Bottom Case
  Important
  Due to contractual restrictions imposed by Microsoft, an HP authorized service provider
must follow special procedures when replacing the bottom case. These restrictions affect
the distribution, handling, and tracking of new, replacement, and replaced Microsoft
Certificate of Authenticity labels attached to the bottom case of the computer. Contact the
HP Call Center in your region for information or see service note...

2-30 Removal and Replacement HP Omnibook 500
 
 Figure 2-21. Removing Bottom Case Components
Installation Procedure
 1.
 Install a new Microsoft Product ID label.
 2.
 Transfer the old serial number label and install a new overlay, or create a new serial number label
using the steps below.
 3.
 Restore the labels on the bottom case, as follows:
 
• If the notebook includes a hardware modem mini-PCI card, attach the hardware modem
telecom regulatory label.
 
• If the notebook includes a LAN/modem mini-PCI...

HP Omnibook 500 Removal and Replacement 2-31
Reassembly Notes
 
• Be careful not to trap the speaker gasket beneath the heads of the retaining screws. Also,
reinstallation may be easier if you first position the speaker grill in the bottom case, then set the
speaker in place.
 
• To replace the docking doors, proceed as follows:
  1.
 Insert a flat-blade screwdriver between the doors, toward the right end of the doors (farthest
from the speaker), and carefully bend one of the doors upward.
 Figure 2-22....

2-32 Removal and Replacement HP Omnibook 500
Repairing the BIOS IC
(HP Authorized Service Providers Only)
The BIOS IC of the Omnibook 500 is not replaceable:
 
• If the BIOS IC is defective, you must replace the motherboard.
 
• However, if the BIOS IC might only be corrupted, you can attempt to repair it using a Crisis
Recovery floppy disk—see below.
  Note: Reprogramming the BIOS IC
 
A new BIOS IC contains only enough basic programming to boot the Omnibook. After installing a
new motherboard, you must...

HP Omnibook 500 Removal and Replacement 2-33
 6.
 Wait while the BIOS is reprogrammed—the display is blank for a minute or more while this
happens.
 If you plugged in a boot block jumper, unplug it before the computer automatically reboots.
 7.
 Make sure the BIOS is the latest version. (You can check this in the Main menu of BIOS Setup,
or in the BIOS menu of Windows e-DiagTools.) If necessary, reprogram the BIOS IC—see the
note at the beginning of this topic.
 
141
25 13
  Figure 2-24. Boot-Block Jumper 

2-34 Removal and Replacement HP Omnibook 500
Removing Omnibook Components
(HP Authorized Service Providers Only)
Required Equipment
 
• #0 Phillips screwdriver.
 
• Small flat-blade screwdriver.
Removal Procedure
 1.
 Unplug the AC adapter, if present, and remove the battery.
 2.
 Remove the assemblies and follow the additional steps given in the table below.
 Table 2-8. Removing Omnibook Components
ComponentRemoval ProcedureAdditional Steps
Battery, backupPower button panel
(page 2-9).
Keyboard (page...